Subaru 2002-2007 GC8/GDB Impreza WRX Pro-Level Rear Axle/Hub Kit with 300m Outer Stub/2pc. The Pro-Level Axle/Hub kit is a complete rear system including both axles, hubs and ARP M12x1.5 extended studs. The axles feature 28 spline 300m grade axle bars, 108mm Porsche-type inner cv with our billet bolt-on stub flanges for the R180 differential. The hubs are machined to work with factory WRX spindles. Rated to 1000HP with a 1-year warranty.